Chelsea, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Chelsea weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Rain68%0.67″79°64°—
- ThursdayJun 4Heavy Rain29%1.5″80°64°+1°
- FridayJun 5Heavy Rain64%1.1″78°61°-2°
- SaturdayJun 6Clear——84°60°+6°
- SundayJun 7Overcast23%—87°65°+3°
- MondayJun 8Light Drizzle45%—82°62°-5°
- TuesdayJun 9Light Drizzle28%—86°60°+4°
Ozone at AQI 36. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
- Present
- AQI 36
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:23 AM
- Moonset
- 2:20 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Chelsea at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: May 17 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Chelsea
SPC has placed Chelsea in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight Risk
- DAY 3MRGLMarginal Risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.